character: Freddie Frequency
topic: Measuring Sound Waves
grade: 3
subject: Computer Science
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character: Sonic the Soundwave
topic: Understanding Sound Waves
grade: 3
subject: Computer Science
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character: Echo the Explorer
topic: Exploring Sound Properties
grade: 3
subject: Computer Science
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character: Wavey the Waveform
topic: Visualizing Sound Waves
grade: 3
subject: Computer Science
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